Heat exchanger



Dec. 4, 1945.

- FIG. I.-

O O O O OO O O A. Y. GUNTER HEAT EXCHANGER Filed Dec. 29, 1943 K INVENTO'R Addison Y (Fur/fer ATT EY Patented Dec. 4, 1945 mm'r nxcnancna Addison Y. Gunter, Larchmont, N. Y., assignor to American Locomotive Company. New York, N. TL, a corporation of New York Applicationllecember 29, 1943, Serial No. 516,003 comma. (Cl. 251-241) This invention relates to heat exchangers and more particularly to a combination lubricating oil and jacket water cooler.

An object of the present invention is to provide a heat exchanger adapted for'the flow therethrough in heat exchange relation of three fluids.

A further object is to provide a combination lubricating oil and jacket water cooler oi compact design. a

Other and further objects of and advantages achieved by the present invention will be apparent from the following description of approved embodiments thereof.

Referring to the drawing forming a part of this application. Figu e. 1 is a vertical section of the heat exchanger of the present invention, taken on the line 1-1 of Fig. 2, parts being shown in iull: Fla. 2 is a section on the line II--lI of P18. 1; Fig. 3 is a section on the line HI1II of Fig. 1; Fig. 4 is a section on the line IV-IV of Pig. 1: Fig. 5 is a section on the line VV of Fig. 1, part of the exchanger being broken away; H8. 6 is a reduced plan view of the exchanger; Fig. 7 is a reduced front elevation of the exchanger: Fig. 8 is a foreshortened section, similar to Fig. 1, of a portion of a modified heat exchanger embody ng the present invention, taken on the line VIII-VIII of Fig. 9; and Fig. 9 is a section on the line IX-IX of Fig. 8.

The heat exchangers shown in the drawing are designed to operate as combination lubricating oil and jacket water coolers. However, the

invention has application to heat exchangers for other purposes.

The combination lubricating oil and jacket water cooler is indicated in the drawing (Figs.

1-7) generally by the reference numeral I. It in ludes a h ader member 2 which is provided with aplurality of nozzles, chambers and a tube heet in the following manner:

Referring to Figs. 1 and 2, it will be seen that the member 2 is an intermediate part of the cooler. A jacket water inlet nozzle 3, at the top of member 2. onenq into a jacket water inlet chamber I provi ed wi h a port 5 in the left side wall I of the cool r. Nozzle 3 may be connected to pining leading from the cyl nder jacket water circulatin pump of an internal combustion engine (not shown) for conducting hot water to the cooler. Chamber 4 extends across the full width of the member 2 and is closed at the bottom by an inclined wall I. A ,iacket water outlet nozzle 8, at the bottom'of member 2, opens from a jacket water outlet chamber 9 provided with a port ll in the left sidewall of the member 2. Nozzle 8 may be connected to piping leading to the engine cylinder jacket (not shown) for returnin cooled water to the engine. Chamber 9 extends across the full width of the member 2 and is closed at the top by an inclined wall ll.

Member 2 further has a right side wall i2,- a forward wall I3 and a rear wall I4. A horizontal wall II, somewhat above wall H, extends from wall I! to wall ll. Wall i5 also extends from wall I 2 to a point half way between walls 6 and It. At this point it is connected by a vertical tube sheet wall I with wall 1,. wall l6 extending from wall it to wall ll. Wall l5 extends beyond wall It from the half thereof adiacent wall II to a point about halfway between wall I! and wall. A vertical wall I! connects the end of wall IS with wall I. 'As the extended portion of wall I! only extends from the wall l3 half way to the wall ll, wall I! extends a like distance from the wall IS. The inner edge of wall I! is connected with the wall 5 by a vertical wall II. at right angles to wall I]. wh ch extends from the wall I downwardly to the wall l5 and further extends below the wall l5 to the walls II and [2. A vertical wall I! below and in l ne with wall I, is connected at its four ed es with walls i5, II, II and il. A vertical wall 20 (Fig. 3) in line with wall II is connected at its top and side e es with the walls 'I, I. and I2 and at its bottom edge with the inner edge of a horizontal wall 2|, which is connected at its other three edges with the walls l8, l2 and I4.

Walls 20 and 2| with the adjacent portions of walls I; II, II and I, deiine an oil inlet chamber 22 into which a nozzle opens. Nozzle 23 may be connected to piping lead ng from the crankcase oil circulating pump of the internal combustion engine (not shown) for conducting hot oil to the cooler. A port 24 is formed in wall l2. into which chamber 22 opens. a

Wall II with the adjacent portions of walls v II, II, l8 and I4 define an oil outlet chamber 7'5 which opens into a nozzle 26. Nozzle 26 maybe connected to piping leading to the engine crankcase (not shown) for returning cooled oil to the engine. A port 21 is formed in the wall l2, into which chamber 25 opens, V

A cooling water inlet nozzle 28, in line with nozzle 23, opens into a primary cooling water chamber 29 in line with chamber 22 and defined by the adjacent portions of walls I, I2, I 5, i3. I4

and I6. Wall I! at the chamber 29 is provided with a large opening 30 for a purpose later to be mentioned. Nozzle 28 may be connected to together.

a 50, the legs of the U-tubes being disposedin a heat exchanger unit. Thus cooler I has two piping leading from a source of cold water (not shown).

A secondary cooling water chamber 3| is defined by the walls l6, I9 and I1, and the adjacent portions of the walls 1, l5, H, l3, l4. l8 and 6 6. Wall 6 to the rear of wall l8 isprovided with opening 34 for a purpose later to be mentioned.

A cooling water outlet nozzle 35, in line with nozzle 26, opens into chamber 33 adjacent the i juncture of walls I2 and I3. Nozzle 35 may be connected to piping for conveying away the water heated in the cooler.

A tube sheet 36 covers wall l2 and a tube sheet 31 covers wall 6. A shell 38 is mounted against tube sheet 36 and a shell 39 is mounted against tube sheet ,31. Orificed lugs 40 are secured to th shells and bolts 4| extend through these lugs and'are provided at both ends with nuts. Bolts 4| secure the shells, tube sheets and member 2 The tube sheets are entirely within the confines of the bolts and are held in proper position by grooves 42 formed therein in which the inner edges of the shells are disposed. Suitable gaskets (not shown) are provided between the shells and tube sheets and between the tube sheets and member 2 to prevent leakage. Weep grooves 43 are also provided at suitable places to prevent contamination of one fluid by another.-

Each shell is provided with an upper and lower slotted sprinkling plate 44 which also are disposed with their inner edges in grooves formed in the tube sheets. Their other edges are welded to the shell. The plates 44 of shell 38 form an upper oil inlet chamber 45, an intermediate oil heat exchanger chamber 46 and a lower oil outlet chamber 41. The plates 44 of shell 39 form an upper jacket water inlet chamber 48, an intermediate jacket water heat exchanger chamber 49, and a lower jacket water outlet chamber 50.

Tube sheet 36 is provided, adjacent chamber 45, with a port 5| in line with port 24, and adjacent chamber 41 with a port 52 in line with port 21, and with tube orifices 53 in line with the opening 30. Straight fin-tubes 54, closed at their outer ends, are disposed in chamber 46 with their open ends in the orifices 53.

Tube sheet 31 is provided, adjacent chamber 48, with a port 55 in line with port 5, and adjacent chamber 50, with a port 56 in line with port 55 I0, tube orifices 51 in line with opening 32 and other tube orifices 58 in line with opening 34. U-tubes 59 are disposed in chamber 49 each withan end disposed in an orifice 51 and its other end disposed in an orifice 58. The U-tubes are sup; 0 ported adjacent their bends by an orificed plate the orifices of the plate.

Straight bayonet tubes 6| are secured in tube orifices 62 formed in tube sheet wall IS in line 65 with fin-tubes 54 into which they extend, tubes 5| opening into tubes 54 adjacent the closed ends thereof and being of a smaller outside diameter than the inside diameter of thetubes 54.

All the tubes of the cooler are secured in their tube orifices by a well-known means, such as by being expanded therein. Each shell forms a section, and the tubes therein another section, of

such units.

The operation of the cooler is as iollows:

Cooling water enters the cooler through the nozzle 28, flows into primary cooling water chamber 29 and therefrom through the opening 38 and into the fin-tubes 54 where it is brought into heat exchange relation with hot lubricating oil, the hot oil entering the cooler through the nozzle 23, flowing through oil inlet chamber 22 and through ports 24 and 5| into the upper oil inlet chamber 45. The oil in chamber 45 drips through the slots in the adjacent upper sprinkling plate 44 into the intermediate heat exchange chamber 45 and onto the tubes 54. Thus the oil is cooled by the cold water contained in tubes 54. The oil, after fiowing'over the tubes 54, leaves chamber 46 in a cooled state through the slots in the lower sprinkling plate 44 adjacent thereto, and flows through the lower oil outlet chamber 41, ports 52 and 21, oil outlet chamber 25 and nozzle 26. Thus chambers 22 and 25 are for supply of oil to the shell 38.

The cooling water flows from the fintubes 54 into bayonet tubes 6|, therefrom. into the secondary cooling water chamber 3|, and therefrom through the opening 32 into the U-tubes 59. Hot jacket water, entering the cooler through the noz-' zle 3, flows through jacket water inlet chamber '4, and ports 5 and 55 into the upper jacket water inlet chamber 48, therefrom through the slots in the adjacent upper sprinkling plate 44 into the intermediate heat exchange chamber 49, dripping on the tubes 59 and thereby being cooled by the cooling waterin the tubes 59. The jacket water 7 leaves the chamber 49 in a cooled state through th Slots in the adjacent bottom sprinkling plate 44, passes through the lower jacket water outlet chamber 50, ports 56 and I8 into jacket water outletchamber 9 from which it leaves the cooler through the nozzle 8. Thus chambers 4 and 9 are for supply of jacket water to the shell 39. The cooling water, which is now at about the same temperature as the jacket water flowing through the nozzle 8, leaves the U-tubes through th opening 34, passes through the third cooling water chamber 33 and out of the cooler through the nozzle 35. Thu chambers 29, 3| and 33 are for supply of cooling water to the tubes of the cooler, chamber 3| being common to both tube sections of the cooler.

From the above it will be seen that cold water entering the cooler, is first brought into indirect heat exchange with hot lubricating oil, thereby cooling same, and thereafter, at a somewhat higher temperature, is brought into indirect heat exchange with hotter jacket water, thereby also cooling the jacket water.

A modification of the invention is shown in Figs. 8 and 9, the cooler therein shown being indicated by the reference numeral 63. It difiers from the cooler l in'lthat U-tubes 64 are employed instead of the fin-tubes 54 and bayonet tubes 6|. Ac-

cordingly, the member 65, which corresponds tov the member 2, is somewhat difieren'tfrom the member 2. Parts of cooler 63 which are similar to cooler I will be indicated by like reference numerals with an'accent added. The difference in structure of the member 55 from the member 2 may be clearly seen to be that there is a primary cooling water chamber 56 which supplies cooling.

water to the U-tubes 54 for cooling the oil. The cooling water flows from the U-tubes 64 into a secondary cooling water chamber 61 and therefrom into the U-tubes 59' for cooling the jacket water. The cooling water cooling the jacket water returns to a third or final cooling water chamber II which opens into an outlet nozzle No fur. ther description of this modification of the present invention is deemed necessary. as in other respects it is similar to the-cooler l.

While the present invention has been described as a combination lubricating oil and jacket water cooler, it may, of course, be employed with other fluids. if desired.

While there'have been hereinbefore described approved embodiments of this invention. it will be understood that many and various changes and modifications in form, arrangement of parts and details of construction there f, may be made without departing from the spirit of the invention, and that all such changes and modifications as come within the scope of the ap ended claims are contemplatedas a part of this invention.

The invention cla med and desired to be secured by Letters Patent is:

l. A combination heat exchanger for indirect heat exchange relation of a common fluid with two other separate fluids comprising two opposed tube-shell heat exchangers, the shells thereof bein! separated one from the other. each of said shells being for one of said separate fluids and said tubes be ng for said c mmon fluid; and a single unitary header for both of said exchan ers and disposed therebetween. said header including seven separated chambers, a pair of said seven chambers prov ded each with a port and opening each to one of said shells serving one as an inlet and the other as an outlet t erefor, another air of said seven chambers provided each w th a port and opening each to the other of said shells servhis one as an inlet and the other as an outlet therefor the remainingthree of said sevenechamin here including a chamber common to the tubes of both exchangers and communicating with the tubes of one of said exchangers for receiving said common fluid therefrom and communicating with the tubes of the other of said exchangers for supplying said common fluid thereto, and a pair of chambers, one having an outlet port and communicating with and serving as an outlet for the tubes receiving said common fluid from said common chamber and the other having an inlet port and communicating with and serving as an inlet for the tubes from which said common chamber receives said common fluid, whereby a single tube fluid will be in indirect heat exchange relation with each of said separate shell fluids.

2; A combination heat exchanger for indirect heat exchange relation of a common fluid with two other separate fluids comprising two opposed tube-shell heat exchangers, the shells thereof being separated one from the other and each of the tubes thereof having two legs in communication at their outer ends, and having their inner ends serving one as an inlet and the other as an outlet therefor. eachof said shells being for one or said separate fluids and said tubes being for said common fluid; and a single unitary header forboth'oi said exchangers anddisposed there- 3 between, said header including seven mted chambers, a pair of said seven chambers provided each with a port and opening each to one of said shells serving one as an inlet and the other as an outlet therefor, another pair of said seven chambers provided each with a port and opening each to the other of said shells serving one as an inlet and the other as an outlet therefor, the remaining three of said seven chambers including a chamber common to the tubes of both exchangers and communicating with said outlets of the tubes of one of said exchangers for receiving said common fluid therefrom and communicating'with said inlets of the tubes oi the other of said exchangers for supplying said common-fluid thereto, and a pair of chambers, one

having an outlet port and communicating with said outlets of the tubes receiving said common fluid from said common chamber and the other having an inlet port and communicating with said inlets of the tubes from which said common chamber receives said common fluid, whereby said common tube fluid will be in indirect heat exchange relation with each of said separate shell fluids. l

3. A combination heat exchanger for indirect each to one of said shells serving one asan inlet above the correlated sprinkli'! plate and the other as an outlet below the correlated tubes thereof, another pair ,of said seven chambers provided each with a port and opening each to the other of said shells serving one as an inlet above the correlated sprinkling plate and the other as an outlet below the correlated tubes thereof. the remaining three of said seven chambers including a chamber common to the tubes of both exchangers and communicating with the tubes of one of said exchangers for receiving said common fluid therefrom and communicating with the tubes of the other oi said exchangers for supplyins said common fluid thereto, and a pair oichambers, one having an outlet port and communicating with and serving as an outlet for the tubes receiving said common fluid from said common chamber and the other havins an inlet port and communicating with and serving as an inlet for the tubes from which said common chamber receives said common fluid. whereby a single tube fluid will be in indirect heat exchange relation with each of said sep rate shell liquids.

ADDISON Y.- GUNTIR. 

